Of course this probably goes without saying, but wherever the forum goes, make sure there are forwarders on for a good length of time.
The first time Cakewalk moved the forum to the present format, I didn't even know they had a forum anymore-it took quite some time to find this one and my "joined date" made me look like a noob even though I had been on the previous forum for years.
People that visit the forum regularly probably wouldn't have an issue, but those that can go months or a year between visits need to be able to find the new home, IMO.
Thanks for asking!